I found some images on another message board, as well as some for other movies & TV shows, mainly "Emergency!" (1972):
http://www.professionalcar.org/forums/showthread.php?t=11872
http://www.professionalcar.org/forums/showthread.php?t=11872&page=2
http://www.professionalcar.org/forums/showthread.php?t=11872&page=3

it's all ready for images: http://www.imcdb.org/movie_74923-Mother,-Jugs-and-Speed.html

A short no-pic list of the vehicles in the 1976 Drive-In comedy Mother, Jugs & Speed:
http://www.imdb.com/title/tt0074923/

1)1972 Cadillac Ambulance.
2)1971-75 GMC-Chevrolet (Bill Cosby's customized ambulance).
3)1971-73 Dodge B-Series Tradesman Ambulance(The one driven by Larry Hagman).
4)1974-75 International Harvester Light-Duty Fire Truck
5)1962 Pontiac Ambulance.
6)1964-67 Ford Mustang
7)1966-76 Mack RL-Series truck.
8)197? AMC Matador Police Car.
9)1962 Chevrolet Impala.
10)1971-72 Ford Pinto.
11)1970 Oldsmobile Ambulance.
12)1968-71 International Harvester Metro(owned by the S.W.A.T. Team).

Now, I'm hoping some of you have pics, otherwise I'll have to struggle with trying to find out how to add them myself.